Fix test case failures for pdp11 target.

	* gcc.c-torture/compile/20151204.c: Skip if pdp11.
	* gcc.c-torture/compile/pr55921.c: Ditto.
	* gcc.c-torture/compile/pr60655-1.c: Ditto.
	* gcc.c-torture/compile/vector-align-1.c: Add max alignment if pdp11.

From-SVN: r260781

gcc/testsuite/ChangeLog

+2018-05-25  Paul Koning  <ni1d@arrl.net>
+
+	* gcc.c-torture/compile/20151204.c: Skip if pdp11.
+	* gcc.c-torture/compile/pr55921.c: Ditto.
+	* gcc.c-torture/compile/pr60655-1.c: Ditto.
+	* gcc.c-torture/compile/vector-align-1.c: Add max alignment if pdp11.
+
 2018-05-25  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/85832

gcc/testsuite/gcc.c-torture/compile/20151204.c

-/* { dg-skip-if "Array too big" { "avr-*-*" } } */
+/* { dg-skip-if "Array too big" { "avr-*-*" "pdp11-*-*" } } */
 
 typedef __SIZE_TYPE__ size_t;
 

gcc/testsuite/gcc.c-torture/compile/pr55921.c

 /* PR tree-optimization/55921 */
+/* { dg-skip-if "Not enough registers" { "pdp11-*-*" } } */
 
 typedef union
 {

gcc/testsuite/gcc.c-torture/compile/pr60655-1.c

-/* { dg-options "-fdata-sections" { target { { ! { { hppa*-*-hpux* } && { ! lp64 } } } && { ! nvptx-*-* } } } } */
+/* { dg-options "-fdata-sections" { target { { ! { { hppa*-*-hpux* } && { ! lp64 } } } && { ! "nvptx-*-* pdp11-*-*" } } } } */
 
 typedef unsigned char unit;
 typedef unit *unitptr;

gcc/testsuite/gcc.c-torture/compile/vector-align-1.c

@@ -2,7 +2,11 @@
 
 /* If some target has a Max alignment less than 128, please create
    a #ifdef around the alignment and add your alignment.  */
+#ifdef __pdp11__
+#define alignment 2
+#else
 #define alignment 128
+#endif
 
 char x __attribute__((aligned(alignment),vector_size(2)));